The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This stock page is the Follow view. The Build view lets your agent query OPRA owners, fund changes, insider filings, and source links through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/OPRA"
Use Arkolith to show who owns OPRA, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Tidal Investments LLC | $35.1M | 2.5M | ▼−5.8% Reduced · −151K sh | Q1 2026 | |
| 2 | Schonfeld Strategic Advisors LLC | $20.4M | 1.4M | ▲+27% Added · +302K sh | Q1 2026 | |
| 3 | Trexquant Investment LP | $4.2M | 295K | ▲+34% Added · +75K sh | Q1 2026 | |
| 4 | CREDIT AGRICOLE S A | $4.0M | 280K | ▼−25% Reduced · −92K sh | Q1 2026 | |
| 5 | CITADEL ADVISORS LLC | $3.2M | 225K | ▼−7.8% Reduced · −19K sh | Q1 2026 | |
| 6 | SEIZERT CAPITAL PARTNERS, LLC | $2.2M | 155K | ▲New +155K sh | Q1 2026 | |
| 7 | Hennion & Walsh Asset Management, Inc. | $1.4M | 99K | ▲+15% Added · +13K sh | Q1 2026 | |
| 8 | VOLORIDGE INVESTMENT MANAGEMENT, LLC | $1.3M | 89K | ▼−70% Reduced · −212K sh | Q1 2026 | |
| 9 | BlackRock, Inc. | $1.3M | 88K | ▲+35% Added · +23K sh | Q1 2026 | |
| 10 | PEAK6 LLC | $1.0M | 71K | ▲16× Added · +66K sh | Q1 2026 | |
| 11 | Private Advisor Group, LLC | $967K | 68K | ▲New +68K sh | Q1 2026 | |
| 12 | &PARTNERS | $806K | 57K | ▲+3.4% Added · +2K sh | Q1 2026 | |
| 13 | GROUP ONE TRADING LLC | $467K | 33K | ▼−38% Reduced · −20K sh | Q1 2026 | |
| 14 | GEODE CAPITAL MANAGEMENT, LLC | $361K | 25K | —Held | Q1 2026 | |
| 15 | Vident Advisory, LLC | $314K | 22K | ▼−4.0% Reduced · −921 sh | Q1 2026 | |
| 16 | Centiva Capital, LP | $300K | 21K | ▲New +21K sh | Q1 2026 | |
| 17 | STATE STREET CORP | $274K | 19K | ▲+2.1% Added · +396 sh | Q1 2026 | |
| 18 | DAVENPORT & Co LLC | $266K | 19K | ▲+20% Added · +3K sh | Q1 2026 | |
| 19 | Kestra Advisory Services, LLC | $211K | 15K | ▲+1.3% Added · +190 sh | Q1 2026 | |
| 20 | CAXTON ASSOCIATES LLP | $210K | 15K | ▼−75% Reduced · −45K sh | Q1 2026 | |
| 21 | Aquatic Capital Management LLC | $209K | 15K | ▼−71% Reduced · −36K sh | Q1 2026 | |
| 22 | IHT Wealth Management, LLC | $167K | 12K | —Held | Q1 2026 | |
| 23 | Steward Partners Investment Advisory, LLC | $162K | 11K | ▲114× Added · +11K sh | Q1 2026 | |
| 24 | Walleye Capital LLC | $154K | 11K | ▲+103% Added · +5K sh | Q1 2026 | |
| 25 | Atria Investments, Inc | $145K | 10K | ▲New +10K sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Mar 26, 2026 | Zhou Yahui | Executive Chairman, Director | Other (J) | 486K | $7.4M |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 42 funds | $13.7B |
| META PLATFORMS INC-CLASS AMETA | 41 funds | $6.2B |
| JPMORGAN CHASE & COJPM | 41 funds | $5.9B |
| COSTCO WHOLESALE CORPCOST | 41 funds | $3.2B |
| AMERICAN EXPRESS COAXP | 41 funds | $1.2B |
| ADOBE INCADBE | 41 funds | $681.5M |
| EBAY INCEBAY | 41 funds | $439.6M |
| APPLE INCAAPL | 40 funds | $15.4B |
| ALPHABET INC-CL AGOOGL | 40 funds | $9.2B |
| BROADCOM INCAVGO | 40 funds | $7.2B |
| TAIWAN SEMICONDUCTOR-SP ADRTSM | 40 funds | $3.6B |
| MICRON TECHNOLOGY INCMU | 40 funds | $3.6B |
Ranked by how many of OPRA's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for OPRA. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.